You are either on a shared internet connection with other people, or people are on YOUR internet connection. These are their machines. If they are on your internet connection, your security stinks and you should encrypt it with a password. If you're on THEIR connect, get off, stop being a leach. If you're on a shared internet connection, there is nothing you can do, it doesn't really effect you anyway.

I'm having exactly the same issues. However, when I'm connected to a different network the neighborhoods change. It's quite annoying and they're sites that I don't even go to - just random URLs. Malware?

I'm just bumping this on the chance that someone passing by might have an answer. I've been having the exact same problem  strange shared networks that are clearly websites, not other computers  and I haven't found an answer anywhere. I've been to two different Apple stores and multiple "geniuses" were completely stumped. Is this just a bug in Mac OS, or is there a security concern I need to be attentive to? Surely someone somewhere must know.

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